[Jeremy Germita]

There is a set pattern. It isn't explicitly stated in the rules, but it goes by the tourney bracket.

1 ---
QF1  | --    |
8 ---          |
         SF1  | --    |
4 ---          |      | 
QF2  | --    |        |
5 ---                 |
                FINALS|
3 ---                 |
QF3  | --|            |
6 ---      |          |
         SF2  | --    |
2 ---      |
QF4  | --|
7 ---

please excuse the bad ASCII art for a bracket I drew

The upper side of the bracket in each set is red, the lower side is blue.
For example, if 8 beats 1, 8 becomes red because they are now in the higher side of the bracket.
As you've probably seen, 1 is perpetually red because they are on the higher part of the bracket throughout.

In the quarterfinals, it's easy to tell. The higher seed is red, and the lower seed is blue.

That rule is no longer true in the semis and finals.
In the semifinals, the winners from QF1 or QF3 will always be red and the winners from QF2 and QF4 will always be blue.

In the finals, the winner from SF1 will always be red and the winner from SF2 will always be blue.



Here is one example of an upset and how the bracket plays out